.headerBox {
    position: relative;
    left: 0;
    top: 0;
    height: 30px;
    width: 360px;
    margin: 5px 0;
}

.inp {
    position: absolute;
    left: 0;
    top: 0;
    height: 20px;
    width: 265px;
    padding-left: 5px;
}

.addBtn {
    position: absolute;
    right: 10px;
    top: 0;
    height: 26px;
    width: 70px;
}

.addBtn:hover {
    background-color: #000;
    color: #fff;
}